The campaign, supported by the murdered toddler’s mum Denise Fergus, calls for an inquiry into Jon Venables time in prison.

He and Robert Thompson were both 10 when they kidnapped, tortured and murdered two-year-old James almost 25 years ago.

Earlier this week, Venables – who lives under a new identity – was caged for owning indecent images of children for a second time.

He was jailed for three years and four months.

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KILLER: Jon Venables murdered little James Bulger

James Bulger: Never-before-seen family pics revealed

We look back at the James Bulger case with never-before-seen family pics that were exposed in the ITV Documentary with Trevor McDonald.

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ITV/PA

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BATTLE: Denise Fergus has fought for more answers over Jon Venables

The petition said “there have been a number of issues that have been swept under the carpet”, including why the killer was deemed safe to society.

It also calls for the release of a person report into “an incident” at a secure unit.

Just days from the 25th anniversary of the time which shocked the nation on February 12 1993, more than 145,000 people had their names put to the claim: “We want a public inquiry into the James Bulger murder case.”

This means it would be considered for debate in Parliament.

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LAST MOMENTS: Jon Venables and Robert Thompson kidnapped James Bulger then killed him

The James Bulger murder

James Bulger was abducted, tortured and murdered by 10-year-old Robert Thompson and Jon Venables, making them the youngest convicted murderers in modern English history

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Police Handout

James Patrick Bulger was murdered on 12 February 1993, at the age of two

“We want a public inquiry into the James Bulger murder case”

James Bulger petition

James’s mum Denise Fergus hailed the milestone, having earlier expressed anger at how the criminal justice system “failed” her and little James.

She tweeted: “Wow we’ve done it, thanks to everyone who have signed and shared my petition, your support has once again been amazing, I’m so lucky to have you all on board.

“You have been with me throughout my very long journey and have never given up.”